What to say about contemporary situation in the European nuclear energy system? It is a previous generation system. We highly appreciate efforts of scientists and engineers who created it, especially the French scientists. It was a wonderful thing at that time. However, now it is a problem of transition to the next generation system. It is an agonizing process due to the inertial structure of nuclear energy system. It is hard for it to be reorganized because technological and economic expenditures are tremendous. However, this transition is an acute necessity.